Photo: Rasbak at Dutch Wikipedia, CC BY-SA 3.0 · source

Jam · From Bladwijzer

Blueberry jam

Updated on 9 October 2026

• Makes: ± 4 jars
• Time: 30 min
• From: Highbush blueberry

Ingredients

• 1 kg blueberries
• juice of 1 lemon
• 500 g gelling sugar 2:1
• optionally a pinch of cinnamon or ½ vanilla pod

Method

1. Rinse the blueberries and roughly crush them in a large pan.
2. Mix with the lemon juice, gelling sugar and the cinnamon or vanilla, if using.
3. Bring to the boil, stirring, and keep at a rolling boil for 4 minutes.
4. Do the cold-plate test, fill clean, hot jars with the hot jam and close at once.

Storing: Unopened, a year in a cool, dark place; once opened, keep in the fridge.